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, G. W. 8: L DEMOND. Chimney- Top.a,n d Ventilator.

No. 224,154. Patented Feb. 3, 1880.

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W/T/VESSZ'S. flVVEA/TOEX UNITED STATES PATENT OFFICE.

GEORGE W. DEMOND AND LOUIS DEMOND, BROOKLYN, N. Y.

CH l M NEY-TOP AN'D' VE NTlLATO R.

SPECIFICATION formingpart ofIietters Patent No. 224,154, dated February 3, 1880.

Application filed February 11, 1879.

,ful Improvements in Chimney-Tops and Ventilators, which improvements are fully set forth inthe following specification and accompanying drawing, in which- J r Figure l is a combined vertical section and side elevation of our improved chimney-top and ventilator. The dotted lines represent the vertical section. v

A is the body or shaft, the top B of which is turned outward to sheer the winil to the outside of the conical top 0. Said conical top 0 is attached to the sh aft A by bracesD'. A guard or outer casing, E, is attached tothe shaft A by braces F, its lower end extending below the outward curved top B of the shaft A, and its upper end extending above the conical top'O. The outer casing is made large, so as to leave a considerable space between its inner sides and the conical top 0, and its outer sides are constructed with an angular or V groove running horizontally around it, the upper angle of said groove being somewhat longer-than the lower one, so as to project beyond it, and is provided with holes or openings G, so that the wind striking the lower angle is turned upwardand through the openings G, thereby causing a powerful upward current. The conical top'O,

which is attached to the shaft A, is for the purpose of preventing the rain or snow passing to the inside of the shaft, and the outwardturned top B of the shaft is to sheer the wind and prevent its getting under the conical top. The top of the outward casing is surmounted with an ornamental railing, giving to-ita very beautiful appearance.

The object of our invention is to provide a' chimney-top and ventilator forimproving the draft in chimneys and for ventilating buildings, so that the wind blowing in any direction will create a powerful upward current, and that shall be so constructed as to harmonize more completely with certain kinds of architecture, its appearance being made to correspond with such architecture.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

The outside casing E, provided with the openings G, and. attached to the shaft A by the braces F and D, the latter supporting the cap 0, substantially as and for the purpos set forth.

GEORGE W. DEMOND.- LOUIS DEMOND.

Witnesses:

Bonus CHANDLER, AUGUSTUS Hum). 

